Solvent refractive index and core charge influences on the surface plasmon absorbance of alkanethiolate monolayer-protected gold clusters

Article Abstract:

Issues concerning the effect of core charge and solvent refractive index on the surface plasmon absorbance of alkanethiolate monolayer-protected gold clusters are presented.

Observations, Absorption, Surfaces, Surfaces (Materials), Alkanes, Refractive index, Plasmons (Physics), Solvents

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Luminescence of tiopronin monolayer protected silver clusters changes to that of gold clusters upon galvanic core metal exchange

Article Abstract:

The synthesis and spectroscopy of three somewhat polydisperse air-stable, water soluble tiopronin (N- 2- mercaptopropionylglycine) monolayer- protected silver clusters (Ag MPC) is presented. The Ag MPCs become organic soluble upon conversion to poly (ethylene glycol) quaternary ammonium salts of the carboxylates of the tiopronin ligand monolayer.

Science & research, Luminescence, Chemical properties

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Mediated electrocatalysis with polyanthraquinone-functionalized monolayer-protected clusters

Article Abstract:

Electrogenerated anthraquinone radical anions that are ligated to monolayer-protected gold clusters were used to reduce 1,1-dinitrocyclohexane. The clusters were prepared by place-exchange of a fraction of the cluster's original octanethiolate ligands with 1-(1,3-dithiapropyl)anthracene-9,10-dione. The electrocatalytic efficiency was found to be larger for cluster-bound anthraquinone. The improvement in catalytic efficiency was due to the smaller diffusion coefficient of cluster-bound anthraquinone compared to that of the monomer, resulting in spatial compression of the reaction zone next to the electrode.

Electrochemistry, Cyclohexane, Anthraquinones

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